Fix Sonar issue:

Strings literals should be placed on the left side when checking for
equality

Change-Id: I4537e08936731ace55aeecb3ad941269ec1eb191
diff --git a/drivers/utilities/src/main/java/org/onosproject/drivers/utilities/YangXmlUtils.java b/drivers/utilities/src/main/java/org/onosproject/drivers/utilities/YangXmlUtils.java
index c1e8771..62a2c57 100644
--- a/drivers/utilities/src/main/java/org/onosproject/drivers/utilities/YangXmlUtils.java
+++ b/drivers/utilities/src/main/java/org/onosproject/drivers/utilities/YangXmlUtils.java
@@ -131,7 +131,7 @@
     private void addProperties(HierarchicalConfiguration cfg, HierarchicalConfiguration complete) {
         cfg.getKeys().forEachRemaining(key -> {
             String property = (String) cfg.getProperty(key);
-            if (!property.equals("")) {
+            if (!"".equals(property)) {
                 complete.setProperty(key, property);
             }
         });